/Engine/Source/Runtime/Datasmith/DatasmithCore/Public/IDatasmithSceneElements.h
Get the weight compound map Weight color, texture and value are only used for multilayered materials.
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IDatasmithCompositeTexture](API\Runtime\DatasmithCore\IDatasmithCompositeTexture) > & GetWeightComp()